| using Lucene.Net.Analysis.Util; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections.Generic; |
| using System.IO; |
| |
| namespace Lucene.Net.Analysis.Path |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /// <summary> |
| /// Factory for <see cref="PathHierarchyTokenizer"/>. |
| /// <para> |
| /// This factory is typically configured for use only in the <code>index</code> |
| /// Analyzer (or only in the <c>query</c> Analyzer, but never both). |
| /// </para> |
| /// <para> |
| /// For example, in the configuration below a query for |
| /// <c>Books/NonFic</c> will match documents indexed with values like |
| /// <c>Books/NonFic</c>, <c>Books/NonFic/Law</c>, |
| /// <c>Books/NonFic/Science/Physics</c>, etc. But it will not match |
| /// documents indexed with values like <c>Books</c>, or |
| /// <c>Books/Fic</c>... |
| /// </para> |
| /// |
| /// <code> |
| /// <fieldType name="descendent_path" class="solr.TextField"> |
| /// <analyzer type="index"> |
| /// <tokenizer class="solr.PathHierarchyTokenizerFactory" delimiter="/" /> |
| /// </analyzer> |
| /// <analyzer type="query"> |
| /// <tokenizer class="solr.KeywordTokenizerFactory" /> |
| /// </analyzer> |
| /// </fieldType> |
| /// </code> |
| /// <para> |
| /// In this example however we see the oposite configuration, so that a query |
| /// for <c>Books/NonFic/Science/Physics</c> would match documents |
| /// containing <c>Books/NonFic</c>, <c>Books/NonFic/Science</c>, |
| /// or <c>Books/NonFic/Science/Physics</c>, but not |
| /// <c>Books/NonFic/Science/Physics/Theory</c> or |
| /// <c>Books/NonFic/Law</c>. |
| /// </para> |
| /// <code> |
| /// <fieldType name="descendent_path" class="solr.TextField"> |
| /// <analyzer type="index"> |
| /// <tokenizer class="solr.KeywordTokenizerFactory" /> |
| /// </analyzer> |
| /// <analyzer type="query"> |
| /// <tokenizer class="solr.PathHierarchyTokenizerFactory" delimiter="/" /> |
| /// </analyzer> |
| /// </fieldType> |
| /// </code> |
| /// </summary> |
| public class PathHierarchyTokenizerFactory : TokenizerFactory |
| { |
| private readonly char delimiter; |
| private readonly char replacement; |
| private readonly bool reverse; |
| private readonly int skip; |
| |
| /// <summary> |
| /// Creates a new <see cref="PathHierarchyTokenizerFactory"/> </summary> |
| public PathHierarchyTokenizerFactory(IDictionary<string, string> args) |
| : base(args) |
| { |
| delimiter = GetChar(args, "delimiter", PathHierarchyTokenizer.DEFAULT_DELIMITER); |
| replacement = GetChar(args, "replace", delimiter); |
| reverse = GetBoolean(args, "reverse", false); |
| skip = GetInt32(args, "skip", PathHierarchyTokenizer.DEFAULT_SKIP); |
| if (args.Count > 0) |
| { |
| throw new ArgumentException(string.Format(J2N.Text.StringFormatter.CurrentCulture, "Unknown parameters: {0}", args)); |
| } |
| } |
| |
| public override Tokenizer Create(AttributeSource.AttributeFactory factory, TextReader input) |
| { |
| if (reverse) |
| { |
| return new ReversePathHierarchyTokenizer(factory, input, delimiter, replacement, skip); |
| } |
| return new PathHierarchyTokenizer(factory, input, delimiter, replacement, skip); |
| } |
| } |
| } |